Ch. 6 Circuits

Question 1

Current formula

Answer 1

I = Q / delta T

Question 2

Kirchhoff’s junction rule

Answer 2

I into junction = I out of junction

Question 3

Kirchhoff’s loop rule

Answer 3

Vsource= Vdrop

Question 4

Def of resistance

Answer 4

R= p L /A.                
p = density
L = length
A= Area

Question 5

Ohm’s law

Answer 5

V= I R

Question 6

• Voltage and Cell EMF

Answer 6

V = Ecell - internal resistance

Question 7

Def of Power ( formula)

Answer 7

P = W/ t=
P= delta E/ t

Question 8

Electric power

Answer 8

P= IV= I^2R= V^2 / (R)

Question 9

Voltage drop across series

Answer 9

Vs= V1 + V2 ……

Question 10

Eq resistance (series)

Answer 10

Rs = R1 + R2 …..

Question 11

Voltage drop ( parallel)

Answer 11

Vp= V1= V2 ….

Question 12

Equivalent resistance ( parallel)

Answer 12

1/ Rp = 1/ R1 + 1/R2 + 1/R3 …

Question 13

Capacitance

Answer 13

C= Q/ V

Question 14

Capacitance based on parallel plate geometry

Answer 14

C= E0 ( A/ d)

E0 is a constant

Question 15

Electric field in a capacitor

Answer 15

E = V/d

Question 16

Potential energy of a capacitor

Answer 16

U= 1/2 CV^2

Question 17

Capacitance with a dielectric material

Answer 17

C’= kC

Question 18

Equivalent capacitance ( series)

Answer 18

1/ Cs = 1/C1 + 1/C2 ….

Question 19

Equivalent capacitance (parallel )

Answer 19

Cp = C1 + C2 + C3 ……